WYOMING
Illinois — Community Water System — PWSID: IL1750200
System Information
| PWSID | IL1750200 |
| System Name | WYOMING |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1981 |
| Last Reported | Feb 26, 2026 |
Location & Contact
| State | Illinois |
| City | WYOMING |
| ZIP Code | 61491 |
| Address | 108 E Williams St |
| Organization | MERCER, JAMES |
| Phone | 309-695-4831 |
Population & Service
| Population Served | 1,300 |
| Service Connections | 700 |
Drinking Water Violations (145)
This water system has 145 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 16, 2025 | — | Other | No | No | — | — | — | Resolved | Jun 27, 2025 | — | |
| Oct 16, 2025 | — | Other | No | No | — | — | — | Resolved | Jun 27, 2025 | — | |
| Jul 1, 2025 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Jul 20, 2020 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Jul 20, 2020 | — | |
| Jul 27, 2000 | Jan 9, 2001 | MCL | Yes | No | 15.8 | 15 pCi/L | — | Resolved | Jan 9, 2001 | — | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1993 | — | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1993 | — | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1993 | — | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1993 | — | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1993 | — | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1993 | — | |
| May 1, 1993 | May 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | May 31, 1993 | — | |
| May 1, 1993 | May 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | May 31, 1993 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Oct 1, 1992 | Apr 21, 1994 | MCL | Yes | No | 27.6 | 15 pCi/L | — | Resolved | Apr 21, 1994 | — | |
| Jul 1, 1992 | Jul 31, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1992 | — | |
| Jul 1, 1992 | Jul 31, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1992 | — | |
| Jul 1, 1992 | Jul 31, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1992 | — | |
| Jun 1, 1992 | Jun 30, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 1992 | — | |
| Jun 1, 1992 | Jun 30, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 1992 | — | |
| Jun 1, 1992 | Jun 30, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 1992 | — | |
| Apr 1, 1992 | Apr 30, 1992 | MR | No | No | — | 5% of samples | — | Archived | Apr 30, 1992 | — | |
| Apr 1, 1992 | Apr 30, 1992 | MR | No | No | — | 5% of samples | — | Archived | Apr 30, 1992 | — | |
| Apr 1, 1992 | Apr 30, 1992 | MR | No | No | — | 5% of samples | — | Archived | Apr 30, 1992 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — | |
| Jan 1, 1992 | Dec 31, 1995 | MCL | Yes | No | 11.7 | 5 pCi/L | — | Resolved | May 9, 1994 | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.